<template>
  <div>
    <el-form inline>
      <el-form-item>
        <el-input v-model="tempSearchObj.roleName" style="width: 250px" placeholder="角色名称" />
      </el-form-item>
      <el-button type="primary" icon="el-icon-search" @click="search">查询</el-button>
      <el-button @click="resetSearch">清空</el-button>
    </el-form>

    <div style="margin-bottom: 20px">
      <el-button type="primary" style="width: 120px" @click="addRole">添加</el-button>
      <el-button type="danger" :disabled="selectedRoles.length === 0" style="width: 120px" @click="removeRoles()">批量删除</el-button>
    </div>

    <el-table
      v-loading="listLoading"
      border
      stripe
      style="width: 100%"
      :data="roles"
      @selection-change="handleSelectionChange"
    >
      <el-table-column type="selection" width="80" align="center" />
      <el-table-column type="index" label="序号" width="80" align="center" />
      <el-table-column label="角色名称">
        <template slot-scope="{ row }">
          <template v-if="row.edit">
            <el-input v-model="row.roleName" class="edit-input" size="small" />
            <el-button
              class="cancel-btn"
              size="small"
              icon="el-icon-refresh"
              type="warning"
              @click="cancelEdit(row)"
            >
              取消
            </el-button>
          </template>
          <span v-else>{{ row.roleName }}</span>
        </template>
      </el-table-column>
      <el-table-column label="操作" width="300" align="center">
        <template slot-scope="{ row }">
          <HintButton
            size="mini"
            type="info"
            icon="el-icon-info"
            title="分配权限"
            @click="$router.push(`/acl/role/auth/${row.id}?roleName=${row.roleName}`)"
          />
          <HintButton
            v-if="row.edit"
            size="mini"
            type="primary"
            icon="el-icon-check"
            title="确定"
            @click="updateRole(row)"
          />
          <HintButton
            v-if="!row.edit"
            size="mini"
            type="primary"
            icon="el-icon-edit"
            title="修改角色"
            @click="row.edit = true"
          />
          <HintButton
            size="mini"
            type="danger"
            icon="el-icon-delete"
            title="删除角色"
            @click="removeRole(row)"
          />
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页组件 -->
    <el-pagination
      :current-page="page"
      :total="total"
      :page-size="limit"
      :page-sizes="[5, 10, 20, 30, 40, 50, 100]"
      style="padding: 20px 0"
      layout="prev, pager, next, jumper, ->, sizes, total"
      @current-change="getRoles"
      @size-change="handleSizeChange"
    />
  </div>
</template>

<script>
export default {
  name: 'RoleList',

  data () {
    return {
      listLoading: true, // 数据是否正在加载
      roles: [], // 角色列表
      total: 0, // 总记录数
      page: 1, // 当前页码
      limit: 5, // 每页记录数
      tempSearchObj: {
        // 收集搜索条件数据
        roleName: ''
      },
      searchObj: {
        // 发送请求的条件参数数据
        roleName: ''
      },
      selectedRoles: [] // 所有选中的角色列表
    }
  },

  mounted () {
    this.getRoles()
  },

  methods: {
    /*
    取消修改
    */
    cancelEdit (role) {
      role.roleName = role.originRoleName
      role.edit = false
      this.$message.warning('取消角色修改')
    },

    /*
    更新角色
    */
    updateRole (role) {
      this.$API.role
        .updateById({ id: role.id, roleName: role.roleName })
        .then(result => {
          this.$message.success(result.message || '更新角色成功!')
          this.getRoles(this.page)
        })
    },

    /*
    每页数量发生改变的监听
    */
    handleSizeChange (pageSize) {
      this.limit = pageSize
      this.getRoles()
    },

    /*
    添加角色
    */
    addRole () {
      // 显示添加界面
      this.$prompt('请输入新名称', '添加角色', {
        confirmButtonText: '确定',
        cancelButtonText: '取消'
      })
        .then(({ value }) => {
          this.$API.role.save({ roleName: value }).then(result => {
            this.$message.success(result.message || '添加角色成功')
            this.getRoles()
          })
        })
        .catch(() => {
          this.$message.warning('取消添加')
        })
    },

    /*
    异步获取角色分页列表
    */
    getRoles (page = 1) {
      this.page = page
      this.listLoading = true
      const { limit, searchObj } = this
      this.$API.role
        .getPageList(page, limit, searchObj)
        .then(result => {
          const { items, total } = result.data
          this.roles = items.map(item => {
            item.edit = false // 用于标识是否显示编辑输入框的属性
            item.originRoleName = item.roleName // 缓存角色名称, 用于取消
            return item
          })
          this.total = total
        })
        .finally(() => {
          this.listLoading = false
        })
    },

    /*
    根据搜索条件进行搜索
    */
    search () {
      this.searchObj = { ...this.tempSearchObj }
      this.getRoles()
    },

    /*
    重置查询表单搜索列表
    */
    resetSearch () {
      this.tempSearchObj = {
        roleName: ''
      }
      this.searchObj = {
        roleName: ''
      }
      this.getRoles()
    },

    /*
    删除指定的角色
    */
    removeRole ({ id, roleName }) {
      this.$confirm(`确定删除 '${roleName}' 吗?`, '提示', {
        type: 'warning'
      })
        .then(async () => {
          const result = await this.$API.role.removeById(id)
          this.getRoles(this.roles.length === 1 ? this.page - 1 : this.page)
          this.$message.success(result.message || '删除成功!')
        })
        .catch(() => {
          this.$message.info('已取消删除')
        })
    },

    /*
    当表格复选框选项发生变化的时候触发
    */
    handleSelectionChange (selection) {
      this.selectedRoles = selection
    },

    /*
    批量删除
    */
    removeRoles () {
      this.$confirm('此操作将永久删除该记录, 是否继续?', '提示', {
        type: 'warning'
      })
        .then(async () => {
          const ids = this.selectedRoles.map(role => role.id)
          await this.$API.role.removeRoles(ids)
          this.getRoles()
          this.$message({
            type: 'success',
            message: '批量删除成功!'
          })
        })
        .then(result => {})
        .catch(() => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        })
    }
  }
}
</script>

<style scoped>
.edit-input {
  padding-right: 100px;
}
.cancel-btn {
  position: absolute;
  right: 15px;
  top: 10px;
}
</style>
